Strain gauge based sensor with improved linearity

A strain gauge based sensor for use in relatively high pressure applications has a diaphram frame with an active diaphragm portion having a high t/D ratio, or t2/A ratio, and an annular groove provided in at least a portion of a periphery of the diaphram frame which alters the strain field on the su...

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Bibliographic Details
Main Author CIMINELLI MARIO J
Format Patent
LanguageEnglish
Published 27.05.2003
Edition7
Subjects
MEASURING
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE
PHYSICS
TESTING
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Summary:A strain gauge based sensor for use in relatively high pressure applications has a diaphram frame with an active diaphragm portion having a high t/D ratio, or t2/A ratio, and an annular groove provided in at least a portion of a periphery of the diaphram frame which alters the strain field on the surface of the active diaphram, causing the radial stresses to be primarily bending stresses and minimizing shear stresses, thus bringing the epsit/epsic ratio closer to one and increasing the linearity of the output of strain gauges affixed to the top of the diaphram.
Bibliography:Application Number: US20000633177